Model Predictive Frequency Control employing stability constraints

A model predictive control (MPC) based control scheme for frequency control (MPFC) in electric power systems using generic energy storage systems is presented. Closed-loop stability is obtained via the incorporation of stability constraints based on Lyapunov theory and the concept of passivity. The proposed MPFC schemes, guaranteeing closed-loop stability, are derived for one-area and two-area power system models. For the two-area power system, coordinated (centralized) and uncoordinated (decentralized) MPFC schemes are implemented. Stability properties were derived and simulated. Passivity and CLF based MPFC schemes have a generally better control performance than conventional frequency control and MPFC. It is notably shown that well-known passivity properties, i.e. interconnections of passive subsystems are also passive, allows for good scalability of passivity based MPFC.